Method for repairing a generator having former-wound coils, generator and wind power installation

A generator for a wind power installation, comprising:

• a plurality of former-wound coils each formed by an electrical conductor extending between a corresponding first connection and a corresponding second connection, wherein the corresponding first connection of a former-wound coil is connected to the corresponding second connection of another former-wound coil of the plurality of former-wound coils, wherein
• the conductor forms two parallel legs extending between a first coil head and a second coil head, by which the two parallel legs are connected together;
• and
• a laminated core for a rotor or a stator, which has a plurality of slots extending in an axial direction parallel to an axis of rotation of the generator and parallel to one another between a first slot end and a second slot end of each of the plurality of slots, wherein the plurality of slots are arranged at a distance from one another in a circumferential direction in relation to the axis of rotation;
• the two parallel legs of the former-wound coils are each inserted in one of the plurality of slots which are closed by a slot closing wedge in a direction of an air gap between the stator and the rotor;
• and
• the electrical conductor of the plurality of former-wound coils is made of aluminum or includes aluminum, and the electrical conductor of at least one leg of at least one former-wound coil of the plurality of former-wound coils is made of copper or comprises copper.

A wind power installation comprising:

• at least one generator comprising:
• a plurality of former-wound coils each formed by an electrical conductor extending between a corresponding first connection and a corresponding second connection, wherein the corresponding first connection of a former-wound coil is connected to the corresponding second connection of another former-wound coil of the plurality of former-wound coils, wherein
• the conductor forms two parallel legs extending between a first coil head and a second coil head, by which the two parallel legs are connected together;
• and
• a laminated core for a rotor or a stator, which has a plurality of slots extending in an axial direction parallel to an axis of rotation of the generator and parallel to one another between a first slot end and a second slot end of each of the plurality of slots, wherein the plurality of slots are arranged at a distance from one another in a circumferential direction in relation to the axis of rotation;
• the two parallel legs of the former-wound coils are each inserted in one of the plurality of slots which are closed by a slot closing wedge in a direction of an air gap between the stator and the rotor;
• and
• the electrical conductor of the plurality of former-wound coils is made of aluminum or includes aluminum, and the electrical conductor of at least one leg of at least one former-wound coil of the plurality of former-wound coils is made of copper or comprises copper.